Convert WAN to LAN

Let's say I've got my router on point A and my Tv on point B.

A <--------> B

I need to connect them through inteet to get a signal on my tv. I don't want to use a cable to achieve this, so I'm looking for a wireless solution.

I know this can be done with dLAN, but is there a more cheaper solution? Via a Router maybe or maybe something else?

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